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Unless you have a loose or cracked fuel line or bad wiring connection causing the pump to not run or loose pressure my best educated guess would be that you didnt change the fuel filter when you replaced the pump in which case if the filter is plugged all of your pressure would be on the fuel tank side of the filter causing you to have little or no pressure at the test port on the fuel rail.

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โˆ™ 2007-03-04 03:22:08
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Q: What would cause no fuel pressure in a 2000 Tahoe after replacing a fuel pump?
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